Well you're awfully short-sighted then, there, smiluu. What do you think mappers were doing before multitexturing became a possibility? Shilling out god-awful maps?
You don't need multitexture for a perfect map, not at all. Thinking that you do is just terribly short-sighted and shows a complete lack of regard to the skills of mappers who choose not to multitexture their maps.
Anyway, in regards to this particular one, since I wound up in here and aught to say something about it: the layout is definitely interesting. I have to agree on the one poster's point about snipe-camping in the lower tunnel, but that being said... you're following a map that was already made for another game. Not really like you can change that and stay true to the design, so I really wouldn't change it.
Otherwise, looks good. I'm liking this string of Hitman themed maps you've got going, very nice.